<template>
  <view>
    <!-- 使用自定义的搜索组件 -->
    <!-- <my-search :bgcolor="'blue'" :radius="15"></my-search> -->
    <my-search @click="gotoSearch"></my-search>
      <view class="scroll-view-container">
        <!-- 左侧的滑动区域 -->
        <scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
          <block v-for="(item, i) in cateList" :key="i"><view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">
            {{item.cat_name}}
          </view>
          </block>
          
          
        </scroll-view>
        <!-- 右侧的滑动区域 -->
        <scroll-view scroll-y="true" :style="{height: wh + 'px'}":scroll-top="scrollTop">
          <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
            <!-- 二级分类的标题 -->
            <view class="cate-lv2-title">
                / {{item2.cat_name}} /
            </view>
            <!-- 当前二级分类的三级分类列表 -->
            <view class="cate-lv3-list">
              <!-- 三级分类的item项 -->
                <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
                  <!-- 三级分类的图片 -->  
                  <image :src="item3.cat_icon" ></image>
                  <!-- 三级分类的文本 -->
                  <text>{{item3.cat_name}}</text>
                </view>
            </view>
            
            
          </view>
        </scroll-view>
      </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  
  export default {
    mixins: [badgeMix],
    data() {
      return {
        // 当前设备可用的高度
        wh: 0 ,
        cateList: [] ,
        active: 0,
        // 二级分类的列表
        cateLevel2:[],
        scrollTop: 0
      };
    },
    onLoad() {
     const sysInfo = uni.getSystemInfoSync()
     console.log(sysInfo)
     this.wh = sysInfo.windowHeight - 50
    this.getCateList()
    },
    methods:{
      // 获取分类列表的数据
      async getCateList(){
      const {data: res} = await uni.$http.get('/api/public/v1/categories')
      if(res.meta.status !== 200) return uni.$showMsg()
      this.cateList = res.message
      
      // 为二级分类赋值
      this.cateLevel2 = res.message[0].children
      },
      activeChanged(i){
       this.active = i 
       // 重新为二级分类赋值
       this.cateLevel2 = this.cateList[i].children
       this.scrollTop = this.scrollTop=== 0 ? 1 : 0
    },
    gotoGoodsList(item) {
      uni.navigateTo({
        url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
      })
    },
    gotoSearch() {
      uni.navigateTo({
        url:'/subpkg/search/search'
      })
    }
    }
      
}
</script>

<style lang="scss">
.scroll-view-container {
  display: flex;
}
.left-scroll-view {
  width: 120px;
}
.left-scroll-view-item{
  background-color: #F7F7F7;
  line-height: 60px;
  text-align: center;
  font-size: 12px;
  &.active{
    background-color: #FFFFFF;
    position: relative;
    &::before{
      content: ' ';
      display: block;
      width: 3px;
      height: 30px;
      background-color: #C00000;
      position: absolute;
      top: 50%;
      left: 0;
      transform: translateY(-50%);
    }
  }
}
.cate-lv2-title {
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3-list {
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    width: 33.33%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
    image{
      width: 60px;
      height: 60px;
    }
    text{
      font-size: 12px;
    }
  }
}
</style>
